forked from AuroraMiddleware/gtk
ec57c6c10b
Sometimes path nodes can survive longer than the style context that created them. Don't crash in those cases. Fixes startup of mutter. Testcase included. https://bugzilla.gnome.org/show_bug.cgi?id=746407
198 lines
5.4 KiB
C
198 lines
5.4 KiB
C
/* GTK - The GIMP Toolkit
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* Copyright (C) 2014 Benjamin Otte <otte@gnome.org>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "config.h"
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#include "gtkcsspathnodeprivate.h"
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#include "gtkcssstylepropertyprivate.h"
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#include "gtkprivate.h"
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#include "gtkstylecontextprivate.h"
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G_DEFINE_TYPE (GtkCssPathNode, gtk_css_path_node, GTK_TYPE_CSS_NODE)
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static void
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gtk_css_path_node_finalize (GObject *object)
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{
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GtkCssPathNode *node = GTK_CSS_PATH_NODE (object);
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if (node->path)
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gtk_widget_path_unref (node->path);
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G_OBJECT_CLASS (gtk_css_path_node_parent_class)->finalize (object);
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}
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static void
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gtk_css_path_node_invalidate (GtkCssNode *node)
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{
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GtkCssPathNode *path_node = GTK_CSS_PATH_NODE (node);
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if (path_node->context)
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{
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GtkBitmask *changes;
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changes = _gtk_bitmask_new ();
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changes = _gtk_bitmask_invert_range (changes,
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0,
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_gtk_css_style_property_get_n_properties ());
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gtk_style_context_validate (path_node->context, changes);
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_gtk_bitmask_free (changes);
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}
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}
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gboolean
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gtk_css_path_node_real_init_matcher (GtkCssNode *node,
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GtkCssMatcher *matcher)
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{
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GtkCssPathNode *path_node = GTK_CSS_PATH_NODE (node);
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if (path_node->path == NULL ||
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gtk_widget_path_length (path_node->path) == 0)
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return FALSE;
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return _gtk_css_matcher_init (matcher,
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path_node->path,
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gtk_css_node_get_declaration (node));
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}
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static GtkWidgetPath *
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gtk_css_path_node_real_create_widget_path (GtkCssNode *node)
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{
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GtkCssPathNode *path_node = GTK_CSS_PATH_NODE (node);
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GtkWidgetPath *path;
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guint length;
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if (path_node->path == NULL)
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path = gtk_widget_path_new ();
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else
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path = gtk_widget_path_copy (path_node->path);
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length = gtk_widget_path_length (path);
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if (length > 0)
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{
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gtk_css_node_declaration_add_to_widget_path (gtk_css_node_get_declaration (node),
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path,
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length - 1);
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}
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return path;
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}
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static const GtkWidgetPath *
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gtk_css_path_node_real_get_widget_path (GtkCssNode *node)
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{
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GtkCssPathNode *path_node = GTK_CSS_PATH_NODE (node);
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return path_node->path;
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}
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static GtkCssStyle *
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gtk_css_path_node_update_style (GtkCssNode *cssnode,
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GtkCssChange change,
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gint64 timestamp,
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GtkCssStyle *style)
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{
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/* This should get rid of animations */
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return GTK_CSS_NODE_CLASS (gtk_css_path_node_parent_class)->update_style (cssnode, change, 0, style);
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}
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static GtkStyleProviderPrivate *
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gtk_css_path_node_get_style_provider (GtkCssNode *node)
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{
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GtkCssPathNode *path_node = GTK_CSS_PATH_NODE (node);
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if (path_node->context == NULL)
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return NULL;
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return gtk_style_context_get_style_provider (path_node->context);
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}
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static void
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gtk_css_path_node_class_init (GtkCssPathNodeClass *klass)
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{
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GtkCssNodeClass *node_class = GTK_CSS_NODE_CLASS (klass);
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GObjectClass *object_class = G_OBJECT_CLASS (klass);
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object_class->finalize = gtk_css_path_node_finalize;
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node_class->invalidate = gtk_css_path_node_invalidate;
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node_class->update_style = gtk_css_path_node_update_style;
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node_class->init_matcher = gtk_css_path_node_real_init_matcher;
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node_class->create_widget_path = gtk_css_path_node_real_create_widget_path;
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node_class->get_widget_path = gtk_css_path_node_real_get_widget_path;
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node_class->get_style_provider = gtk_css_path_node_get_style_provider;
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}
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static void
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gtk_css_path_node_init (GtkCssPathNode *cssnode)
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{
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}
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GtkCssNode *
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gtk_css_path_node_new (GtkStyleContext *context)
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{
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GtkCssPathNode *node;
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g_return_val_if_fail (context == NULL || GTK_IS_STYLE_CONTEXT (context), NULL);
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node = g_object_new (GTK_TYPE_CSS_PATH_NODE, NULL);
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node->context = context;
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return GTK_CSS_NODE (node);
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}
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void
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gtk_css_path_node_unset_context (GtkCssPathNode *node)
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{
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gtk_internal_return_if_fail (GTK_IS_CSS_PATH_NODE (node));
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gtk_internal_return_if_fail (node->context != NULL);
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node->context = NULL;
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gtk_css_node_invalidate_style_provider (GTK_CSS_NODE (node));
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}
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void
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gtk_css_path_node_set_widget_path (GtkCssPathNode *node,
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GtkWidgetPath *path)
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{
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gtk_internal_return_if_fail (GTK_IS_CSS_PATH_NODE (node));
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if (node->path == path)
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return;
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if (node->path)
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gtk_widget_path_unref (node->path);
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if (path)
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gtk_widget_path_ref (path);
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node->path = path;
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gtk_css_node_invalidate (GTK_CSS_NODE (node), GTK_CSS_CHANGE_ANY);
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}
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GtkWidgetPath *
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gtk_css_path_node_get_widget_path (GtkCssPathNode *node)
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{
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gtk_internal_return_val_if_fail (GTK_IS_CSS_PATH_NODE (node), NULL);
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return node->path;
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}
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